Simulation of reinjection at Cerro Prieto using an idealized two-reservoir model

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An idealized two-reservoir model was introduced to explore some of the effects of reinjection in a geothermal field. For both the single-well model and the doublet model, the results indicate that reservoir pressures will be adequately maintained even when an intervening layer of low permeability is present. The same intervening layer may nevertheless be an effective barrier to the movement of cold fronts, due to the effect of gravity and viscosity on the flow of denser colder waters. This shows promise for developing reinjection strategies that can be tested on more detailed simulation models for specific sites such as th ...
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Description

An idealized two-reservoir model was introduced to explore some of the effects of reinjection in a geothermal field. For both the single-well model and the doublet model, the results indicate that reservoir pressures will be adequately maintained even when an intervening layer of low permeability is present. The same intervening layer may nevertheless be an effective barrier to the movement of cold fronts, due to the effect of gravity and viscosity on the flow of denser colder waters. This shows promise for developing reinjection strategies that can be tested on more detailed simulation models for specific sites such as th Cerro Prieto field.

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